1,2

a(n)=(1/6)*(44*n^3-60*n^2+22*n)

Cf. A100161, A100162 = alternate vertices; A100145 for more on structured polyhedral numbers.

Sequence in context: A100161 A100162 A051729 this_sequence A124954 A126413 A044358

Adjacent sequences: A100160 A100161 A100162 this_sequence A100164 A100165 A100166

easy,nonn

James A. Record (james.record(AT)gmail.com). Nov 07, 2004.